Please help me! I'm taking a test that closes in 10 minutes!
1) Simplify √-49 using the imaginary unit i.
2) Simplify √-20 using the imaginary unit i.
3) Simplify the expression. Write it in standard form. (-3 + 2i) + (2 + i)
4) Simplify the expression. Write it in standard form. (9 +4i)²
5) Simplify the expression. Write it in standard form. (5i √-32) (i √-27)

Respuesta :

Answers:

1) [tex]7i[/tex]

2) [tex]2i\sqrt{5}[/tex]

3) [tex]-1+3i[/tex]

4) [tex]65+72i[/tex]

5) [tex]60\sqrt{6}[/tex]

Hope this helps! :)